U2781A USB Modular Product Chassis

Introduction

The Keysight U2781A USB modular product chassis is a high-performance 4U chassis that comes with a 200 W universal AC power supply and a built-in protection circuit. This portable chassis can house up to six Keysight USB modular products. The U2781A targets a wide range of applications in both industrial and scientific environments in the research and development (R&D), design-validation, and manufacturing fields. The primary advantage of this chassis is its synchronization capability between modules. This can help you to lower your cost of testing and accelerate your test system integration and development.

The U2781A is equipped with an internal 10 MHz reference clock for each module slot. There are two temperature sensors to monitor the internal temperature and a built-in fan to maintain the internal temperature. The trigger bus enables the USB modular products to trigger signals to each other.

Notice: The U2781A will be discontinued on June 1, 2024. The last day to place order for this product is May 31, 2024. Keysight will continue to provide world-class support for this product for the standard period of 5 years.

Features

• Internal and external 10 MHz reference clock

• Simultaneous Synchronization Interface (SSI)

• Star trigger

• External trigger-in and trigger-out signals

• Temperature and fan speed monitoring

• Compatible with Hi-Speed

• USB 2.0 and USBTMC-USB488 standard

• Rackmount kit available as an option

Supported Product

The chassis supports the following USB modular products:

• USB modular data acquisition (DAQ) including:

o U2300 Series USB modular multifunction DAQ devices

o U2500 Series USB modular simultaneous sampling multifunction DAQ devices

o U2600 Series USB modular isolated digital I/O devices

• USB modular instruments including:

o U2701A/U2702A USB modular oscilloscope

o U2722A/U2723A USB modular source measure unit

o U2741A USB modular digital multimeter

o U2751A USB modular switch matrix

o U2761A USB modular function/arbitrary generator

High-density data acquisition

The U2781A chassis increases the number of available channels when any U2300 Series, U2500 Series, or U2600 Series products are slotted into the chassis. For example, when you slot six U2331A Series products in the chassis, it allows for an expansion of up to 384 channels, providing a high-density data acquisition solution.

Internal and external 10 MHz reference clock

The U2781A is equipped with a 10 MHz reference clock. It is used to synchronize the time base of the USB modular products slot into the chassis for more precise measurements.

Simultaneous Synchronization Interface (SSI)

SSI provides synchronization between the modular products in the chassis by allowing the modules to be configured as Primary or Secondary. Please refer to the Keysight U2781A USB Modular Product Chassis User’s Guide for more information.

Triggering using Star trigger bus

The U2781A comes with a Star trigger bus, which offers precise synchronization between USB modular products and the external trigger signal. The star trigger bus provides dedicated trigger lines between the external trigger input and slotted USB modules. You can also achieve precise triggering between each USB modular product via the synchronized routing of the star trigger.

System option

The U2781A USB modular product chassis has a mountable rackmount kit, which can be ordered separately (see “Optional Accessories” on page 8). This allows for a better setup when the U2781A is integrated into a test system.